During such a special day, the little “Bulbs” listened to a story about the sustainable building of the Gas Museum. Then the group completed a giant puzzle on energy and became investigators in a treasure hunt to find objects that allowed the change that led to the production of gas from coal. To end the day and say goodbye, after playing with baby carriages that work with different energies and using a compass to situate the Museum in its surroundings, the little “Bulbs”, their parents and grandparent, received a gift from the Gas Museum.